mcs/class/System.Web.Mvc3/Mvc/ClientDataTypeModelValidatorProvider.cs

   1 namespace System.Web.Mvc {
   2     using System;
   3     using System.Collections.Generic;
   4     using System.Globalization;
   5     using System.Linq;
   6     using System.Web.Mvc.Resources;
   7
   8     public class ClientDataTypeModelValidatorProvider : ModelValidatorProvider {
   9
  10         private static readonly HashSet<Type> _numericTypes = new HashSet<Type>(new Type[] {
  11             typeof(byte), typeof(sbyte),
  12             typeof(short), typeof(ushort),
  13             typeof(int), typeof(uint),
  14             typeof(long), typeof(ulong),
  15             typeof(float), typeof(double), typeof(decimal)
  16         });
  17
  18         public override IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ControllerContext context) {
  19             if (metadata == null) {
  20                 throw new ArgumentNullException("metadata");
  21             }
  22             if (context == null) {
  23                 throw new ArgumentNullException("context");
  24             }
  25
  26             return GetValidatorsImpl(metadata, context);
  27         }
  28
  29         private static IEnumerable<ModelValidator> GetValidatorsImpl(ModelMetadata metadata, ControllerContext context) {
  30             Type type = metadata.ModelType;
  31             if (IsNumericType(type)) {
  32                 yield return new NumericModelValidator(metadata, context);
  33             }
  34         }
  35
  36         private static bool IsNumericType(Type type) {
  37             Type underlyingType = Nullable.GetUnderlyingType(type); // strip off the Nullable<>
  38             return _numericTypes.Contains(underlyingType ?? type);
  39         }
  40
  41         internal sealed class NumericModelValidator : ModelValidator {
  42             public NumericModelValidator(ModelMetadata metadata, ControllerContext controllerContext)
  43                 : base(metadata, controllerContext) {
  44             }
  45
  46             public override IEnumerable<ModelClientValidationRule> GetClientValidationRules() {
  47                 ModelClientValidationRule rule = new ModelClientValidationRule() {
  48                     ValidationType = "number",
  49                     ErrorMessage = MakeErrorString(Metadata.GetDisplayName())
  50                 };
  51
  52                 return new ModelClientValidationRule[] { rule };
  53             }
  54
  55             private static string MakeErrorString(string displayName) {
  56                 // use CurrentCulture since this message is intended for the site visitor
  57                 return String.Format(CultureInfo.CurrentCulture, MvcResources.ClientDataTypeModelValidatorProvider_FieldMustBeNumeric, displayName);
  58             }
  59
  60             public override IEnumerable<ModelValidationResult> Validate(object container) {
  61                 // this is not a server-side validator
  62                 return Enumerable.Empty<ModelValidationResult>();
  63             }
  64         }
  65
  66     }
  67 }